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a ball is thrown vertically upward with a speed of 25m/s,
A) how high does it rise.
B) how long does it take to reach its highest point?
C) how lnong does the ball take to hit the ground after it reachest highest point?
D) what is the velocity when its returned to the level from which it started?
A 3.8 kg ball is at rest on the floor in a 1.2 m ? 1.2 m ? 1.2 m room of air at STP. Air is 80% nitrogen (N2) and 20% oxygen (O2) by volume. What is the thermal energy of the air in the room
Consider a simple cubic crystal structure with a cube edge a= 3.5x10^-10 m and suppose it is used to scatter 3.10x^-10 m x-rays, Find the Bragg angle theta
The end milling cutter has two teeth and its diameter = 15.0mm. Find out the feed rate and time to complete the cut.
An observer inside the building notices that it takes 0.15s for the tile to pass her window, whose height is 2.20m. How far above the top of this window is the roof.
A 41-kg box is thrown at a speed of 220 m/s & is brought to a halt in a collision that lasts for a time of 6.5 m/s. Find the magnitude of the average net force that acts on the box during the collision.
A 5 kg mass attached to a horizontal spring is pulled from its equilibrium position by 3 m and let go. what is the maximum velocity of the mass
Ten cars at an intersection are blowing their horns simultaneously, What is the average sound level for each car
If an amount of heat equal to magnitude of the work done by friction is absorbed by the crate of fruit and the fruit reaches a uniform final temperature, what is its temperature change DeltaT.
You're taking a self portrait in the mirror using a camera. If you stand 5.7 m away from the mirror and you see your face in focus. What distance will that scale show
find the work done by the field on the electron. What is the change in potential energy associated with the electron.
Calculate the energy of a photon required to excite a hydrogen atom from the n = 5 state to the n = 6 state
The nucleus of an atom has a radius of about 5.1×10-15 m. The electron is normally at a distance of about 6.2×10-11 m from the nucleus, Find the volume of the nucleus
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